Laboratory filter



FIG. 1 shows a top and side perspective view of the laboratory filter.

FIG. 2 shows a bottom and reverse side perspective view thereof.

FIG. 3 shows a side elevation view thereof.

FIG. 4 shows a reverse side elevation view thereof.

FIG. 5 shows a third side elevation view thereof.

FIG. 6 shows a fourth side elevation view thereof.

FIG. 7 shows a top plan view thereof.

FIG. 8 shows a bottom plan view thereof; and,

FIG. 9 shows a cutaway view of FIG. 6 in order to show depth of an interior disc shown in FIGS. 1 and 3. 

CLAIM The ornamental design for the laboratory filter, as shown and described. 